The totally-professional-we-promise cast — including Peter Dinklage, Sophie Turner, Natalie Dormer, and even Pedro Pascal — can't seem to stop giggling as they film even the most severe scenes from season 4!

Ch-ch-check out the video (above) to see the flubs, the curses, and the surprising amount of slips!

But now, that's all about to change, at least according to TMZ! That's because a week from tomorrow -- on December 17 -- Khloé and Lamar's split will be legal, final, and FULL! And that's all she wrote!

As the final divorce docs are set to be stamped by a judge on that day just over a week from right now, the final terms are pretty standard and straightforward, too: